Pozzolanic concrete with improvable strength and preparation method thereof

Abstract

The invention discloses a pozzolanic concrete with improvable strength, which is prepared from the following materials: 38-44 parts by weight of silicate cement, 30-34 parts by weight of acid picklingquartz sand, 18-24 parts by weight of modified trass volcanic ash, 18-22 parts by weight of melamine water reducer, 16-20 parts by weight of gypsum powder mixed with carborundum, 6-10 parts by weightof olivinite, 6-10 parts by weight of apophyllite, 6-10 parts by weight of mullite, 3-5 parts by weight of porous limestone, 2-4 parts by weight of marble, 1-3 parts by weight of barium hydroxide, and 22-28 parts by weight of deionized water, and the pozzolanic concrete with improvable strength provided by the invention can provide extremely high strength in the early stage so as to improve the construction efficiency.

Description

technical field [0001] The invention relates to the technical field of pozzolan concrete, in particular to a pozzolan concrete whose strength can be improved and a preparation method thereof. Background technique [0002] Volcanic ash refers to crushed rocks and mineral particles with a diameter of less than 2 mm erupted by volcanoes. During explosive volcanic movements, solid stones and magma are decomposed into fine particles to form volcanic ash. It has volcanic ash activity, namely Under the condition of normal temperature and water, it can react with lime (CaO) to form hydrates with hydraulic gelling ability, so it can be used as cement mixing materials and concrete admixtures after grinding. Pozzolan cement is composed of silicate Cement clinker and pozzolanic mixed materials such as volcanic ash, tuff, pumice, zeolite, diatomaceous earth, fly ash, burnt clay, burnt shale, coal gangue, etc., are made by adding appropriate amount of gypsum and grinding. Pozzolan cement ...

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Problems solved by technology

[0003] The existing Chinese patent literature (publication number: CN106882941A) discloses a high-performance pozzolanic concrete and its production process, which belongs to the field of deep processing of non-metallic ore, including cementitious materials, sand, stone, water and admixtures. The materials include cement, high-quality volcanic ash, and silica fume, and the admixture is a high-efficiency water reducer; the composition of each raw material is: the amount of water ≤ 150kg, and the total amount of cementitious materials is 300-350kg / m 3 , wherein: the amount of cement is 50%-60% of the total amount of cementitious materials, the amount of high-quality pozzolan is 30%-40% of the total amount of cementitious materials, and the amount of silica fume is 2%-5% of the total amount of cementitious materials; The dosage of the high-efficiency water reducer is 0.5%-1.0% of the total amount of cementitious materials. The modified invention adopts the addition of pozzolan to the cement. Although the pozzolan can improve the strength of concrete, the strength is still not optimal and needs further improvement.

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